Mailinglist Archive: opensuse (908 mails)

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Re: [opensuse] Graphics for Server
On 2016-06-01 15:58, Per Jessen wrote:
Carlos E. R. wrote:

On 2016-06-01 13:51, Per Jessen wrote:
Carlos E. R. wrote:

It works wonders for playing HDTV streams from mythtv. On a somewhat
modern Intel CPU. Without it, HDTV is generally impossible. YMMV.
More modern CPUs might be better, dunno. A lot of HPC is done on
GPUs these days, so they're good for something.

Ok, but ffmpeg does not use any of it for conversion, only for
display. It does not affect the OP case.

I don't think you can conclude that. ffmpeg doesn't _display_ anything,
it converts. Anyway, I can't test it, maybe the OP can tell us.

The manual page excerpt I posted does not agree:

Note that most acceleration methods are
intended for playback and will not be
faster than software decoding on modern
CPUs. Additionally, ffmpeg will usually
need to copy the decoded frames from the
GPU memory into the system memory,
resulting in further performance loss. This
option is thus mainly useful for testing.

It says "playback". Maybe that does not mean "display".
I understand it can be used to decode the input stream, but then has to
be read from video memory to normal memory before it is used to recode
on the output stream, so it is slower.

Cheers / Saludos,

Carlos E. R.
(from 13.1 x86_64 "Bottle" at Telcontar)

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